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Paraniite-(Y)

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Costa Balzi Rossi, Magliolo, Maremola Valley, Savona Province, Liguria, Italy
© G. Armellino

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Formula:
Ca
 
2
Y(AsO
 
4
)(WO
 
4
)
 
2
System:TetragonalColour:Cream-yellow
Lustre:Adamantine, Vitreous
This page provides mineralogical data about Paraniite-(Y).

Classification of Paraniite-(Y)

IMA status:Approved
Nickel-Strunz 10th (pending) edition ID:7.GA.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
A : Without additional anions or H2O
Dana 8th edition ID:49.4.7.1

49 : HYDRATED MOLYBDATES AND TUNGSTATES
4 : Compound Molybdates and Tungstates
mindat.org URL:http://www.mindat.org/min-7215.html
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Type Occurrence of Paraniite-(Y)

Type Locality:Mt Cervandone (Scherbadung), Devero Alp (Devero Valley; Val Devero), Baceno, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy

Physical Properties of Paraniite-(Y)

Lustre:Adamantine, Vitreous
Diaphaneity (Transparency):Translucent
Colour:Cream-yellow

Crystallography of Paraniite-(Y)

Crystal System:Tetragonal
Class (H-M):4/m - Dipyramidal
Space Group:I41/a
Cell Parameters:a = 5.135(1) Å, c = 33.882(5) Å
Ratio:a:c = 1 : 6.598
Unit Cell Volume:V 893.41 ų (Calculated from Unit Cell)
Z:4
Morphology:Rough elongated bipyramids
X-Ray Powder Diffraction:
d-spacingIntensity
4.674 (18)
3.059 (100)
2.571 (19)
1.901 (32)
1.818 (16)
1.674 (17)
1.562 (32)

Optical Data of Paraniite-(Y)

Type:Uniaxial (+)
RI values: nω = 1.870 nε = 1.920
Maximum Birefringence:δ = 0.050

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Paraniite-(Y)

Formula:
Ca
 
2
Y(AsO
 
4
)(WO
 
4
)
 
2
Essential elements:As, Ca, O, W, Y
All elements listed in formula:As, Ca, O, W, Y

Relationship of Paraniite-(Y) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.GA.05Fergusonite-(Ce)
(Ce,La,Nd)NbO
 
4
7.GA.05Fergusonite-(Nd)
(Nd,Ce)(Nb,Ti)O
 
4
7.GA.05Fergusonite-(Y)
YNbO
 
4
7.GA.05Powellite
Ca(MoO
 
4
)
7.GA.05Scheelite
Ca(WO
 
4
)
7.GA.05Stolzite
Pb(WO
 
4
)
7.GA.05Wulfenite
Pb(MoO
 
4
)
7.GA.10Formanite-(Y)
YTaO
 
4
7.GA.10Iwashiroite-(Y)
Y(Ta,Nb)O
 
4

Other Names for Paraniite-(Y)

Synonyms:
IMA1992-018Paranite-(Y)
Other Languages:
German:Paraniit-(Y)
Russian:Параниит-(Y)

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Paraniite-(Y)

Reference List:

- +
Demartin, F., Gramaccioli, C. M., Pilati, T. (1992): Structure of a new natural tungstate arsenate, [Ca2Y(AsO4)(WO4)2], structurally related to scheelite. Acta Crystallographica C48, 1357-1359.

Demartin, F., Gramaccioli, C. M., Pilati, T. (1994): Paraniite-(Y), a new tungstate arsenate mineral from Alpine fissures. Schweizerische Mineralogische und Petrographische Mitteilungen 74, 155-160.

New Minerals (1997), New Minerals 1990-1994.

Brugger, J., Gieré, R., Grobéty, B., and Uspensky, E. (1998): Scheelite-powellite and paraniite-(Y) from the Fe-Mn deposit at Fianel, Eastern Swiss Alps. Am. Mineral. 83, 1100-1110.

Internet Links for Paraniite-(Y)

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  • Raman and XRD data at RRUFF project
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  • Paraniite-(Y) details from Handbook of Mineralogy (PDF)
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    • Localities for Paraniite-(Y)

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Italy
     
    • Liguria
      • Savona Province
        • Maremola Valley
          • Magliolo
    		Bracco, R., Castellaro, F., Ciuffardi, M., Odicino, G. (2009): Paraniite-(Y) ed altri ritrovamenti da Costa Balzi Rossi. Prie - Notiziario di Mineralogia Ligure, 5, 61-75.
    • Piedmont
      • Verbano-Cusio-Ossola Province
        • Ossola Valley
          • Baceno
            • Devero Alp (Devero Valley; Val Devero)
    		Demartin, F., Gramaccioli, C. M., Pilati, T. (1994): Paraniite-(Y), a new tungstate arsenate mineral from Alpine fissures. Schweizerische Mineralogische und Petrographische Mitteilungen 74, 155-160.; Lapis, 20 (7/8), 41-64+76.; Guastoni, A. (2009): Monte Cervandone. Recenti novità mineralogiche. Rivista Mineralogica Italiana 2009 (1), 38-48.
    Switzerland
     
    • Grischun (Grisons; Graubünden)
      • Hinterrhein Valley
        • Ferrera Valley
          • Ausserferrera
    		Brugger J., Gieré R., Grobéty B., Uspensky E., 1998. Scheelite-powellite and paraniite-(Y) from the Fe-Mn deposit at Fianel, Eastern Swiss Alps. Am. Miner., 83: 1100-1110.
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